Measurement setup for differential spectral responsivity of solar cells

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2020-04-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
OPTICAL REVIEW
Abstract
We have developed a setup for measuring differential spectral responsivities of unifacial and bifacial solar cells under bias light conditions. The setup uses 30 high-brightness LEDs for generating a quasi-monochromatic light source covering the wavelength range 290–1300 nm. Halogen lamps are used to generate bias-lighting conditions up to the irradiance level of 1000 W/m2. The setup has been fully characterized for spectral irradiances and spatial uniformities of all light sources. Validation measurements carried out using a reference cell of 2 × 2 cm2 area from Fraunhofer ISE demonstrated an agreement better than 2% over the wavelength range of 425–940 nm, with an expanded uncertainty of 2.6%. In the UV and IR regions, the discrepancies are higher but still within estimated uncertainties. The setup is also tested in measuring spectral responsivities of large 15 × 15 cm2 bifacial solar cells. The associated problems are discussed.
Description
Keywords
Bifacial, Efficacy, Electricity, Radiometry, Solar cell, Spectral responsivity
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Citation
Kärhä , P , Baumgartner , H , Askola , J , Kylmänen , K , Oksanen , B , Maham , K , Huynh , V & Ikonen , E 2020 , ' Measurement setup for differential spectral responsivity of solar cells ' , OPTICAL REVIEW , vol. 27 , no. 2 , pp. 195 - 204 . https://doi.org/10.1007/s10043-020-00584-x